Phosphorus adsorption onto green synthesized nano-bimetal ferrites: Equilibrium, kinetic and thermodynamic investigation

Yao Jen Tu, Chen-Feng You

研究成果: Article

43 引文 斯高帕斯(Scopus)

摘要

Phosphorus (P) in natural aquatic environments is one of the most critical elements for causing eutrophication. On the other hand, it is also an essential nutrient for organisms in broad ecosystems. Therefore, it has become an important issue in environmental and ecological sciences to remove and recover efficiently of P in various water bodies. This study investigates the feasibility of P removal/recovery using nano-bimetal ferrites (CuFe2O4), manufactured from industrial sludge. These new results reveal that a rapid P removal, from 9.9% to 99.9%, was observed when the solution pH decreased from 9.06 to 2.64. The maxima P adsorption capacity was found to be 13.5mgg-1 at pH 2.64 (318K), which is much higher than other available adsorbents. The observed negative changes in the standard free energy (δG=-4.99, -5.47, -6.12, -7.21kJmol-1 at 288, 298, 308, and 318K, respectively) and the positive value of δH(1.92kJmol-1) demonstrate that the adsorption reaction is spontaneous and endothermic. Moreover, we observed also that the P adsorption increases with the increased of ionic strength from 0.001 to 1.0N, suggesting important involvement of some inner-sphere mechanisms.

原文English
頁(從 - 到)285-292
頁數8
期刊Chemical Engineering Journal
251
DOIs
出版狀態Published - 2014 九月 1

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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